The claim and state H 0 and H a .

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Answer 1

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Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 8.1, Problem 15E

a.

To determine

To identify: The claim and state H0 and Ha .

b.

To determine

To find: The critical value and rejection region for a two-tailed test with α=0.10 .

c.

To determine

To find: The standardized test statistic z.

d.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.10 .

e.

To determine

To interpret: The decision in the context of the original claim.

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I just need to know why this is wrong below: What is the test statistic W? W=5 (incorrect) and What is the p-value of this test? (p-value < 0.001-- incorrect) Use the Wilcoxon signed rank test to test the hypothesis that the median number of pages in the statistics books in the library from which the sample was taken is 400. A sample of 12 statistics books have the following numbers of pages pages 127 217 486 132 397 297 396 327 292 256 358 272 What is the sum of the negative ranks (W-)? 75 What is the sum of the positive ranks (W+)? 5What type of test is this? two tailedWhat is the test statistic W? 5 These are the critical values for a 1-tailed Wilcoxon Signed Rank test for n=12 Alpha Level 0.001 0.005 0.01 0.025 0.05 0.1 0.2 Critical Value 75 70 68 64 60 56 50 What is the p-value for this test? p-value < 0.001

Answer 2

Question

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 8.1, Problem 15E

a.

To determine

To identify: The claim and state H0 and Ha .

b.

To determine

To find: The critical value and rejection region for a two-tailed test with α=0.10 .

c.

To determine

To find: The standardized test statistic z.

d.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.10 .

e.

To determine

To interpret: The decision in the context of the original claim.

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Answer 3

Question

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 8.1, Problem 15E

a.

To determine

To identify: The claim and state H0 and Ha .

b.

To determine

To find: The critical value and rejection region for a two-tailed test with α=0.10 .

c.

To determine

To find: The standardized test statistic z.

d.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.10 .

e.

To determine

To interpret: The decision in the context of the original claim.

Expert Solution & Answer

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Answer 4

Question

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 8.1, Problem 15E

a.

To determine

To identify: The claim and state H0 and Ha .

b.

To determine

To find: The critical value and rejection region for a two-tailed test with α=0.10 .

c.

To determine

To find: The standardized test statistic z.

d.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.10 .

e.

To determine

To interpret: The decision in the context of the original claim.

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Answer 5

Chapter 8.1, Problem 15E

a.

To determine

To identify: The claim and state H0 and Ha .

b.

To determine

To find: The critical value and rejection region for a two-tailed test with α=0.10 .

c.

To determine

To find: The standardized test statistic z.

d.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.10 .

e.

To determine

To interpret: The decision in the context of the original claim.

Answer 6

Chapter 8.1, Problem 15E

a.

To determine

To identify: The claim and state H0 and Ha .

Answer 7

Chapter 8.1, Problem 15E

a.

To determine

To identify: The claim and state H0 and Ha .

Answer 8

b.

To determine

To find: The critical value and rejection region for a two-tailed test with α=0.10 .

Answer 9

b.

To determine

To find: The critical value and rejection region for a two-tailed test with α=0.10 .

Answer 10

c.

To determine

To find: The standardized test statistic z.

Answer 11

c.

To determine

To find: The standardized test statistic z.

Answer 12

d.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.10 .

Answer 13

d.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.10 .

Answer 14

e.

To determine

To interpret: The decision in the context of the original claim.

Answer 15

e.

To determine

To interpret: The decision in the context of the original claim.

Answer 16

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Answer 17

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Answer 18

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Answer 19

Ch. 8.1 - Prob. 1TY Ch. 8.1 - Prob. 2TY Ch. 8.1 - Prob. 3TY Ch. 8.1 - What is the difference between two samples that...Ch. 8.1 - Explain how to perform a two-sample z-test for the...Ch. 8.1 - Describe another way you can perform a hypothesis...Ch. 8.1 - What conditions are necessary in order to use the...Ch. 8.1 - Prob. 5E Ch. 8.1 - Prob. 6E Ch. 8.1 - Independent and Dependent Samples In Exercises 58,...

The claim and state H 0 and H a .

To identify: The claim and state H0 and Ha .

To find: The critical value and rejection region for a two-tailed test with α=0.10 .

To find: The standardized test statistic z.

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.10 .

To interpret: The decision in the context of the original claim.

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Chapter 8 Solutions